@techreport{NBERw13961, title = "Institutions and Contract Enforcement", author = "Armin Falk and David Huffman and W. Bentley MacLeod", institution = "National Bureau of Economic Research", type = "Working Paper", series = "Working Paper Series", number = "13961", year = "2008", month = "April", URL = "http://www.nber.org/papers/w13961", }